Patricia from Phoenix writes
The turf herbicide and fertilizer components in Hi-Yield Weed and Grass Stopper with Dimension Herbicide are not effective until activated by rainfall or irrigation. Performance is improved if application is followed by 1/2 inch of rainfall or sprinkler irrigation. Erratic weed control may result if not activated by rainfall or irrigation within 30 days after application. It is best to water in within 24 hours.
Answer last updated on: 04/18/2018